It's been a very long time since I've done any vision tests, but I remember something like that, and I'd passed all my vision tests with flying colors - admittedly, that was over two decades ago.

I definitely process vision from both of my eyes, but it's kind of difficult to describe. It's almost like there's kind of an overlay between the two scenes outside of the focal point - but it's not nearly as distracting or disorienting as that sounds. I'm getting all the data, I'm just not assembling it correctly.

The small grace for me is that traditional 3D shooters never made me feel disoriented. However, when I tried Half Life 2 on an early Oculus Rift, I got simulation sickness pretty bad - felt nauseous for a good 45 minutes after playing for about 5 minutes :|